Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
  • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
  • B21D39/021—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
  • B21D5/16—Folding; Pleating
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/53—Means to assemble or disassemble
  • Y10T29/53709—Overedge assembling means
  • Y10T29/53787—Binding or covering
  • Y10T29/53791—Edge binding

Definitions

• the present invention relates to apparatus for bending a margin flange, which projects at an angle to a workpiece surface, against said surface, said apparatus including a preliminary bending tool which is mounted on a first tool holder carried by a linkage mechanism for movement in relation to a stand which is stationary relative to a support surface on which the workpiece is placed, and further including a bend finishing or clinching tool mounted on a second tool holder which is carried by a parallelogram linkage for movement in relation to the stand, and also a drive arrangement which is connected drivingly to said two tool holders.
• Apparatus of this kind are previously known and are used for bending an upstanding margin flange on one plate or panel around a margin of another plate or panel, to pro ⁇ vide therewith a clinching or hemming joint between the two plates or panels. Such operations are common, for instance, in the vehicle manufacture industry, in the production of different vehicle body parts.
• the object of the present invention is to provide an improved apparatus of the aforesaid kind.
• This object is achieved in that the linkage mechanism between the first tool holder and the stand is a parallelogram linkage mechanism which is arranged such that an imaginary connecting line between the stand-carried pivot axes of the links of said linkage mechanism extends substantially at right angles to an imaginary connecting line between the stand-carried pivot axes of the links of the paral ⁇ lelogram linkage of the second tool holder; and in that the drive arrangement includes a single drive member which is connected between the stand and a link in the parallel ⁇ ogram linkage of the second tool holder such as to drive said second tool holder, and a drive link which is con ⁇ nected between the parallelogram linkage of the second tool holder and the first tool holder, such as to drive said first tool holder.
• Figure 1 is a somewhat schematic side view of bending apparatus constructed in accordance with the invention
• Figure 2 is a schematic side view of the apparatus of
• Figure 1 and illustrates the apparatus components in their respective starting positions, prior to commencing a working sequence
• Figure 3 is a schematic side view of the apparatus of Figure 1. and illustrates the apparatus components in their respective preliminary bending or pre-for posi ⁇ tions, during a working sequence
• Figure 4 is a schematic side view of the apparatus of Figure 1 and illustrates the apparatus components in their respective bend finishing or clinching position.
• the illustrated bending apparatus comprises a stand 1 which is supported on a support surface 2, of which only a small part is shown and which supports a workpiece 3.
• the illustrated workpiece 3 is a sheet metal rail having an upstanding margin flange 4. which in the Figure 2 illustration extends upwards from the major part of the workpiece, and which in Figure 3 is shown in a preliminar ⁇ ily bent position and in Figure 4 is shown in its fully bent or clinching position.
• the workpiece 3 may be elong ⁇ ated at right angles to the plane of the drawing and may therewith be straight or curved.
• the pre-bend tool 5 is mounted on a first tool holder 7, which is connected to the stand 4 by means of two links 8 and 9.
• the links 8 and 9 are of mutually equal length and are journalled on respective journal pins 10 and 11 on the stand 1, and on respective journal pins 12 and 13 on the tool holder 7.
• the spacing between the journal pins 10 and 11 is equal to the spacing between the journal pins 12 and
• the clinching tool 6 is mounted on a second tool holder
• the links 15 and 16 are journalled on respective journal pins 17 and 18 on the stand 1, and on respective journal pins 19 and 20 on the tool holder 14.
• the spacing between the journal pins 17 and 18 is equal to the spacing between the journal pins 19 and 20. and the links 15 and 16 are also of mutually equal lengths, so as to form a parallelogram linkage mechanism which carries the tool holder 14 in relation to the stand 1.
• An imagin ⁇ ary connecting line between the geometric axes of journal pins 17 and 18 will therewith be substantially perpen ⁇ dicular to an imaginary connecting line between the geometric axes of journal pins 10 and 11, which means that the parallelogram linkage mechanism which carries the tool holder 14 is substantially perpendicular to the parallel ⁇ ogram linkage mechanism which carries the tool holder 7.
• the stand also carries a drive arrangement by means of which the pre-bend tool 5 and the clinching tool 6 are moved so as to bend-in the margin flange 4.
• This drive arrangement includes a pressure-medium operated piston- -cylinder device 21, which is pivotally mounted on journal pins 22 fixedly mounted on the stand 1.
• the piston- -cylinder device 21 includes a piston rod 23 which is provided with an end piece 24.
• the end piece 24 is connected by a journal pin 25 to an arm 26, which forms an extension of the link 16 on the other side of the journal pin 18. Consequently, the link 16 can be swung around the journal pin 18, by displacing the piston rod 23 axially in relation to the cylinder 21, therewith to move the tool holder 14 and the clinching tool 6 towards or away from the workpiece 3.
• the link 16 In the vicinity of the journal pin 20 the link 16 is also provided with a journal pin 27 on which one end of a drive link 28 is journalled. The other end of the drive link 28 is journalled on a journal pin 29 on the tool holder 17 carrying the pre-bend tool 5. Consenquently, the drive link 28 will move the tool holder 7 and the pre-bend tool 5 in response to pivotal movement of the link 16 about the journal pin 18, this movement being controlled by the parallelogram linkage mechanism 8-13 in a manner described in more detail here below.
• Figure 2 illustrates the starting position of the apparatus components, in which both the pre-bend tool 5 and the clinching tool 6 are spaced from the workpiece 3 and the margin flange 4 located thereon.
• the piston rod 23 is fully withdrawn in the cylinder 21, and hence the link 16 is swung anti-clockwise to a maximum (seen on the drawing) about the journal pin 18 on the stand 1.
• the tool holder 14 and the clinching tool 6 have therewith been raised to an uplifted position, with the aid of the parallelogram linkage mechanism 15-20.
• the link 16 is pivoted about the journal pin 18, by ex ⁇ tending the piston rod 23 from the cylinder 21, whereby the parallelogram linkage mechanism 15-20 moves the tool holder 14 and the clinching tool 6 in a direction towards the workpiece 3.
• the drive link 28 will also move the tool holder 7 and the pre-bend tool 5 towards the workpiece 3, this movement being controlled by the parallelogram linkage mechanism 8-13.
• the drive link 28 has moved the tool holder 7 to the maximum possible extent towards the workpiece 3. and the pre-bend tool 5 has been moved into engagement with the margin flange 4 and has preliminarily bent the flange.
• the link 16 between the journal pins 18 and 27 and the drive link 28 form a toggle link mechanism, which in the position illustrated in Figure 3 is fully extended, i.e. the journal pins 18, 27 and 29 are located on a straight line.
• This means that pivotal movement of the link 16 about the journal pins 18 from the position shown in Figure 3 will cause the tool holder 7 and the pre-bend tool 5 to be moved away from the workpiece 3, irrespective of the pivoting direction.
• the clinching tool 6 and its tool holder 14 have been moved towards the work- piece 3, although the clinching tool 6 is still spaced from the margin flange 4.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bending Of Plates, Rods, And Pipes (AREA)
• Press Drives And Press Lines (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20371772

Family Applications (1)

Country Status (10)

Cited By (14)

Families Citing this family (3)

Citations (2)

Family Cites Families (5)

• 1988
  • 1988-03-21 SE SE8801036A patent/SE461194B/sv not_active IP Right Cessation
• 1989
  • 1989-03-07 EP EP89904268A patent/EP0407443B1/en not_active Expired - Lifetime
  • 1989-03-07 WO PCT/SE1989/000105 patent/WO1989009101A1/en active IP Right Grant
  • 1989-03-07 JP JP1503822A patent/JP2569186B2/ja not_active Expired - Fee Related
  • 1989-03-07 DE DE68926538T patent/DE68926538T2/de not_active Expired - Fee Related
  • 1989-03-07 KR KR1019890702090A patent/KR0136597B1/ko not_active IP Right Cessation
  • 1989-03-07 US US07/566,402 patent/US5035136A/en not_active Expired - Lifetime
  • 1989-03-07 AU AU33571/89A patent/AU621356B2/en not_active Ceased
  • 1989-03-10 CA CA000593329A patent/CA1334496C/en not_active Expired - Fee Related
  • 1989-03-20 ES ES8901006A patent/ES2013857A6/es not_active Expired - Lifetime

Patent Citations (2)

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